Front Panel Controls; Protection Led - NAD T955 Owner's Manual

FRONT PANEL CONTROLS

1. POWER SWITCH/STANDBY LED
Press this button to switch the amplifier on or off. The Power
LED located just above the power button and Protection LEDs
(see Protection LED below) will light up. After a few seconds, the
Protection LEDs will switch from amber to blue, indicating that the
amplifier is ready for use.
The T955 can also be remotely switched from Standby to On and vice-
versa using the 12V-trigger input on the back panel. When the T955
is in the Standby mode, the Standby LED will be amber indicating
the Standby mode. For the 12V-trigger input to work, the T955
must first be turned on by means of the front panel Power Switch,
and the switch must be left in this position. Using the 12V-trigger
source component, switch its 12V-trigger output to on and off. The
T955's trigger input will now follow the source component's 12V-
trigger output. Ensure that the Auto Trigger switch on the back panel
is in the ON position and that the 12V-trigger input is connected
properly.
T955 ML - e.indd 9

2. PROTECTION LED

The Protection LEDs turn red for about 3 seconds, every time the
amplifier is switched on. After a few seconds they will turn blue and
the amplifier is ready for operation.
These LEDs turn red when one or more of the internal five amplifiers
go into protect mode, but the other amplifiers will continue to
function as shown by their blue LEDs so it is likely you will still hear
sound.
When the amplifier is switched off from normal operation by means
of the front panel power switch, or to Standby via the rear panel
trigger source, the Protection LEDs will light up red and will fade out
in a couple of seconds.
NOTE: If you see a Protection LED turn red, turn off the amplifier
immediately using the front panel Power Switch. Check if all
speaker wires are connected correctly and that none of the wires
are damaged, causing a short circuit. Another cause may be
excessive heat build-up inside the amplifier. Make sure there is
adequate ventilation around the amplifier and that none of its
ventilation slots, top or bottom, are blocked. After the amplifier
has cooled down it will function normally again.
In case one or more of the Protection LEDs remains red despite the
checks mentioned above, turn the amplifier off by means of the
front panel Power Switch and consult your NAD dealer.
3. SOFT CLIPPING LIGHT
When the Soft Clipping circuit of the T955 is activated the indicator
LED on the front panel will light.
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